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Microcline : ClassicGems.net

In Colorado, in the Pikes Peak area, El Paso County, Crystal Peak, Teller County, with large crystals from the Devil's Hole beryl mine, Fremont County; in the Black Hills, Pennington and Custer Counties., South Dakota.

Devils Hole Mine (Wild Rose Mine), Devils Hole area ...

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devils hole beryl mine fremont county colorado usa

devils hole beryl mine, fremont county, colorado, usa. Fremont County, Colorado Genealogy | Learn | FamilySearch.org 1861--Fremont County was created 1 November 1861 as one of the 17 original counties of the Territory of Colorado.

Devils Hole Quarry in Fremont County, Colorado

Devils Hole Quarry is a Mine in Fremont County, CO with an elevation of 5,968 feet, or 1,819 meters above sea level. Additional PlaceKeeper notes: Beryllium, feldspar, and mica mine A satellite image of the Devils Hole Quarry area in Fremont County, CO.

"Unnamed Pegmatite" in Fremont, CO, Beryllium Past ...

"Unnamed Pegmatite" is a past producer deposit site in the Rocky Mountain System of Colorado, The United States. It is a small deposit, located in the Bull Ridge Area/Devils Hole Area mining district and is not considered to be of world-class significance. 1 Beryllium and lithium deposits are documented at "Unnamed Pegmatite."

Devils Hole Beryl Mine Fremont County Colorado Usa

Fremont County - Colorado Geological Survey

Fremont County . Eight Mile Park District . ... Activity as recent as the 1960s saw quartz, beryl and mica at the Devils Hole Mine, quartz at the ... (Colorado Dept of Mines annual reports). Several of the mines are specifically discussed in Baillie (1962) and Sharpes (1962).

Bob's Rock Shop: Largest Mineral Crystals on Record

American Institute of Professional Geologists Colorado Section

American Institute of Professional Geologists –Colorado Section ... In Colorado, most beryllium occurs as beryl in peg-matites. Vanderwilt in 1957 detailed beryl occur-rences (and production) as coming mainly from the Eight Mile Pegmatite District in Fremont County (particularly the Devils Hole Pegmatite). Other production came from the ...

devils hole beryl mine fremont county colorado usa

devils hole beryl mine, fremont county, colorado, usa. Fremont County, Colorado Genealogy | Learn | FamilySearch.org 1861--Fremont County was created 1 November 1861 as one of the 17 original counties of the Territory of Colorado.

Largest Mineral Crystals on Record - John Betts

Possibly the largest crystal ever found, as of 1981, was a single crystal of microcline from the Devils Hole Beryl Mine in Fremont County, Colorado. Miners exposed a single crystal that was estimated to measure 49.38 meters long, 35.97 meters high and 13.72 meters deep, with an estimated volume of 6214.41 cubic meters and estimated weight of ...